/*
 * Copyright (C) 2020 Graylog, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the Server Side Public License, version 1,
 * as published by MongoDB, Inc.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * Server Side Public License for more details.
 *
 * You should have received a copy of the Server Side Public License
 * along with this program. If not, see
 * <http://www.mongodb.com/licensing/server-side-public-license>.
 */
import React from 'react';
import { useFormikContext } from 'formik';

import { Users } from '@graylog/server-api';

import debounceWithPromise from 'views/logic/debounceWithPromise';
import { FormikFormGroup } from 'components/common';

type UsernameData = {
  username: string;
  available: boolean;
};

const debounceTimeoutMs = 600;

const validateUsername = async (value: string | undefined) => {
  if (!value) {
    return Promise.resolve('');
  }

  return Users.checkUsernameAvailability(value).then((response: UsernameData) => {
    if (response.available) return '';

    return 'Username is already taken';
  });
};

const debouncedValidateUsername = debounceWithPromise(validateUsername, debounceTimeoutMs);

const UsernameFormGroup = () => {
  const { setFieldTouched } = useFormikContext();

  return (
    <FormikFormGroup
      label="Username"
      name="username"
      required
      help="Select a unique user name used to log in with."
      validate={debouncedValidateUsername}
      onChange={() => setFieldTouched('username')}
    />
  );
};

export default UsernameFormGroup;
